If they have experience with cats, they probably already know the care they require. If they don't, then absolutely, give them a care guide and tips on what and what not to do to keep them safe. Perhaps a list of toxins (like Easter Lilies, antifreeze), info on cat nutrition (that they are an oblique carnivore and shouldn't be eating grains/veggies) and a list of quality canned food (I would be giving that out to even to the experienced cat owners because most just blatantly trust the pet food industry).
I, personally, could not adopt out one of my fosters if I didn't think they knew a lot about cats, but that's my controlling, overprotective, nobody-can-give-care-like-me, personality
.